8 November 1944:
KACHOSAN MARU, destined for Hong Kong, is detached for Kirun (Keelung) and Takao, Formosa as are two unidentified ships. DAIA, KINSEN, NIKKO MARUs and NIKKO MARUs are also detached for Kirun.
AKAGISAN and NICHIYO MARUs, both destined for Manila, are also detached for Kirun.

1 December 1944:
At 0755, KACHOSAN MARU departs Takao for Hong Kong in convoy HO-103 also consisting of KANSHU and SHINSEI MARUs escorted by minesweeper W-102.